package com.example.scurity.utils;



import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.example.core.constants.Constants;
import com.example.core.constants.SecurityConstants;
import com.example.core.constants.TokenConstants;
import com.example.core.context.SecurityContextHolder;
import com.example.core.domain.LoginUser;
import com.example.core.utils.ServletUtils;
import com.example.scurity.exception.ServiceException;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

/**
 * 用户安全工具类
 */
public class SecurityUtils {
    /**
     * 获取用户ID
     */
    public static Long getUserId() {
        try {
            LoginUser loginUser = getLoginUser();
            if (loginUser != null) {
                return loginUser.getUserId();
            }
            return 0L;
        } catch (Exception e) {
            throw new ServiceException("未获取到当前用户信息");
        }
    }

    /**
     * 获取登录用户信息
     */
    public static LoginUser getLoginUser() {
        return SecurityContextHolder.get(SecurityConstants.LOGIN_USER, LoginUser.class);
    }

    /**
     * 获取请求token
     */
    public static String getToken() {
        return getToken(ServletUtils.getRequest());
    }

    /**
     * 根据request获取请求token
     */
    public static String getToken(HttpServletRequest request) {
        // 从header获取token标识
        String token = request.getHeader(TokenConstants.AUTHENTICATION);
        return replaceTokenPrefix(token);
    }

    /**
     * 裁剪token前缀
     */
    public static String replaceTokenPrefix(String token) {
        // 如果前端设置了令牌前缀，则裁剪掉前缀
        if (StringUtils.isNotEmpty(token) && token.startsWith(TokenConstants.PREFIX)) {
            token = token.replaceFirst(TokenConstants.PREFIX, "");
        }
        return token;
    }

    /**
     * 生成BCryptPasswordEncoder密码
     *
     * @param password 密码
     * @return 加密字符串
     */
    public static String encryptPassword(String password) {
        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
        return passwordEncoder.encode(password);
    }

    /**
     * 判断密码是否相同
     *
     * @param rawPassword     真实密码
     * @param encodedPassword 加密后字符
     * @return 结果
     */
    public static boolean matchesPassword(String rawPassword, String encodedPassword) {
        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
        return passwordEncoder.matches(rawPassword, encodedPassword);
    }
}
